Binding-post



(No Model.)

T. R. ABERNETHY.

BINDING POST.

No. 297,655. Pate nted Apr. 29, 1884.

Im/nt UT= Thomas R Abe/"n ethy Winesses= N, PETERS. Fhnlo-Lx'lhugnpher.Wnlhinglun. D. c.

UNITED Seams PATENT rrrcri.

THOMAS It. ABERNETHY, or oHIoAco, ILLINOIS.

BINDING-POST.

SPECIFICATION forming part of I etters Patent No. 29'7,655, dated April29,1884.

I Application filed November 11,1883. (No model.)

To aZZ whom, it may concern Be it known that I, THOMAS E. ABERNETHY, acitizen of the United States, and a resident of the city of Chicago,in'the county of Cook and State of Illinois, have invented certain newand useful Improvements in Binding-Posts, of which the following is aspecification.

My invention relates. especially to devices employed for securingelectrical connection betweenwires and other conductors, and has for.its object the production of a binding-post wherein the connection issure, presenting a large surface to the conducting-wire, clean,andaffording ample protection from dust,wet,&c.; wherein the wire will notbe out, work loose, or pull out; which does not leave the end of thewire projecting to make a cross or cut-out ing the post to anyappropriate support. The

upper portion of the base bears a screwthreaded projection, perforatedwhere it joins the base for the passage of the conducting-wire. A capthe interior or lower portion whereof corresponds in shape to the upperportion of the base is arranged to fit thereon, being forced down uponthe conducting-wire by athreaded cavity therein,which engages with theproj ection from the lower portion of the post. A milled button at thetop of the cap facilitates manipulation; and my invention also involvescertain other novel and useful combinations or arrangements of parts andpeculiarities of construction and operation, all of which will behereinafter first fully described, and then pointed out in the claims.

In the drawings, Figure 1 is a side elevation of my improvedbinding-post. Fig. 2 is avertical aXial sectional view thereof. Fig. 3is a perspective View of the postwith the cap removed. Fig. 4 is avertical sectional view of a modified form of post, showing a screw atthe bottom of the cap engaging with athread around the base.

Like letters of reference,wherever they occur, indicate correspondingparts in all the figures.

A is the base of the post, provided with a screw-threaded perforation,B, adapted and arranged to engage with ascrew, O, for securing thedevice to a board, table, or other support, D. I prefer this mode ofattaching the post to its support, as it is often desirable to have theconducting-wire join the post upon a particular side, and the post asthus constructed can be secured in the requisite position; but of coursea screw might be affixed to or form a part of the base of the post, asin those of ordinary construction.

E is a shoulder formed upon the base, slotted at e for the passage ofthe conducting-wire, the upper portion, E, of the base being conical orsugar-loaf in shape, as plainly shown.

F is a screw-threaded projection extending from the base, saidprojection being perforated at f for the passage of the conductingwireG.

H is a cappiece, the lower surface or interior whereof corresponds inshape to the upper portion, E, of the base A, a female screw, J,engaging with the proj cction F. The top K of the cap is milled orroughened to facilitate manipulation.-

WVhen constructed in accordance with the foregoing description, myimproved bindingpost willbe found admirably adapted to the uses andpurposes for which it is intended, as it may be made of any size for usewith any gage of wire.

In placing the post in position for use, the base is first secured tothe support and the wire passed through the perforation f. When the capis placed in position and screwed home, it will bend the wire down uponeach side of the upper portion of the base, wedging it tightly betweenthe surface thereof and the wall of the cap, and as the spacetherebetween gradually decreases as the cap passes downward, variousthicknesses of wire may be employed with one size of post, and asthewire extends entirely over the conical portionof the base in the smallersizes of posts, there will be nearly an inch of contact, insuring asubstantially perfect electrical connection. If,

new, the cap be removed, a good contact will 1 arranged to receive aconducting-wire, substill be maintained, as the wire will continue tohug the base of the post.

In the post shown in Fig. 4: a screw-thread, L, is formed above thecollar E or upon the collar, a corresponding screw-thread, L, near therim of the cap engaging therewith, fornr ing a tight joint between theparts; but the screw-thread may be left off of the projection A, thethread at the rim of the cup being sufficient to hold the parts.

Having now fully described my invention, what I claim as new therein,and desire to secure by Letters Patent, is-

l. Abinding-postfor forming electrical connection between aconducting-wire and other conductors, consisting of a conical orsugarloaf-shaped base provided with means for securing to a support, andhaving a projection at its apex perforated for the passage of theconducting-wire, a cap the interior whereof conforms in shape to thebase engaging therewith, substantially as and for the uses and purposesshown and described.

2. In a device of the character herein specified, a conical postprovided with a screwthreaded perforation at bottom for engaging with asecuring-screw, as set forth, and hav ing a perforated projection at topadapted and stantially as shown and described.

3. A binding-post wherein the upper portion of the base is conical orsugar-loaf in shape,[a screw-thread being formed at the base of thecone, and arranged to engage with a corresponding thread near the rim ofa cap passing down thereover, substantially as shown and described.

1. The co1nbination,with the base A, having a conical upper portion,E,of ascrcw-threaded projection, F, perforated at f, substantially asand for the uses and purposes shown and described.

5. In a binding-post of the character here in specified, base A,screw-threaded perforation B, screw 0, cone E, projection F, perforatedat f, and cup or cap-piece II, the whole combined and arranged tooperate substantially as shown and described.

In testimony that I claim the foregoing as my invention I have signed myname, in presence of two witnesses, this 13th day of October, 1883.

THOMAS H. ABERNETHY.

